%0 Journal Article %A Tkáč, Michal %T On longest circuits in certain non-regular planar graphs %J Mathematica slovaca %D 1995 %P 235-242 %V 45 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1995__45_3_a2/ %G en %F MASLO_1995__45_3_a2